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Showing: 101 - 120 of 614 results
  1. Optimizing Donor DNA for Enhanced CRISPR Genome Editing

    Type
    Blog Post
    Published
    March 24, 2016, 2:30 p.m.
    ... Figure 1 below) was free to anneal to complementary ssDNA molecules in vitro. Figure 1: Cas9 binding...Corn Lab Members who worked on this publication:         References 1. Richardson, Christopher D., et al...allowed sequence replacement rates of approximately 1%. This is by no means a large number, but it was attained... reagent. This interplay falls into two broad categories and thus, causes two types of editing outcomes...altering its function). HDR is crucial for certain applications, for example, correcting the allele that causes... dissociation rates and discovered that the catalytically active form of the nuclease dissociates very...we measured identical dissociation rates for catalytically inactive dCas9 molecules. We followed these ...
  2. Deep Dive: qPCR

    Type
    Blog Post
    Published
    Sept. 29, 2022, 1:15 p.m.
    ...(a) (b)  (c)   Fig. 1: Melt curves showsing (a) a single peak, indicating one amplicon and no primer...PCR products in a rich web application, Bioinformatics, Volume 27, Issue 7, 1 April 2011, Pages 1019–1020...relatively easy to multiplex (Thellwell, 2000). See Table 1 for a comparison of features of several commonly used...in primer Yes Yes Agarose gel Table 1: Features of various qPCR chemistries. Adapted from...changes in ΔΔCT are represented by RQs between 0 and 1. Flipping your experimental and control values during...see this fold change as a positive difference (RQ>1), which may be easier to conceptualize. Just remember... in Molecular Biology, vol. 1160, DOI 10.1007/978-1-4939-0733-5_3, © Springer Science+Business Media New...
  3. Exploring Applications of the Bioluminescent HiBiT Tag

    Type
    Blog Post
    Published
    Oct. 2, 2025, 1:15 p.m.
    ...reconstitutes a fully functional luciferase enzyme (Figure 1). Addition of substrate generates a proportionate ...questions before creating knock-ins.  Figure 1: Schematic of HiBiT tagging technology.   The...overcomes these challenges and enables precise quantification with with nothing more than substrate addition...real time. Let's take a closer look at several applications of this technology. In each section below, we...LgBiT fusion proteins to track how specific modifications to the binding sites and various isoforms led...
  4. Easing the Protein Purification Process with pCri

    Type
    Blog Post
    Published
    June 19, 2015, 3:08 p.m.
    ...individually or as a complete kit from Addgene. References 1. Goulas, Theodoros, et al. "The pCri system: a vector...protein purification. For a more thorough introduction to pCri, please see the original publication cited...expression and purification: a comprehensive review of affinity tags and microbial applications." Biotechnology... Protein purification can be one of the most stressful lab activities. Working with proteins requires...interest can save a lot of time later. Protein purification specialists recommend doing some research, notably...Gomis-Rüth, aims to take the guesswork out of protein purification through simple and efficient multiplexing. pCri...sites should one need to remove the tag post-purification. A sample of pCri constructs: pCri-1a, -4a ...
  5. Making CRISPR Plasmids Using Fragmid

    Type
    Blog Post
    Published
    Aug. 29, 2024, 1:15 p.m.
    ...building it! Table 1 has a list of Fragmid destination vectors currently available. Table 1: Fragmid destination...components on the Fragmid website.   Figure 1: (Top) Schematic overview and timeline of the Golden... CRISPR vector the Fragmid way!    Figure 1: Selecting your vector type on the Fragmid website...components available will depend on your answers in step 1, so you’ll only be able to select components that ...ampicillin resistance cassette and an origin of replication, which are not schematized. Sizes of fragments...five months. When they tested those clones (in duplicate), 93% had the correct banding pattern in the restriction...correct. Because they created the assemblies in duplicate, they were able to confirm that at least one plasmid...
  6. How-to: 5 Steps to a Great Panel Discussion

    Type
    Blog Post
    Published
    Oct. 22, 2014, 1:57 p.m.
    ...not let the panelists introduce themselves. I do a 1-2 minute introduction. If you chose good panelists...take 5 minutes to introduce themselves and, voila, 1/2 of your time is gone with no interesting discussion...introductions. The moderator asks questions, calling on 1-2 panelist for each question in a way that elicits... time you are at a talk and the speaker goes over 1 hour, watch what happens to the attention of the audience...postures shift, they are checking out. If you can, plant 1-2 good questions with trusted audience members. A ... about making sure the audience is interested, educated and talking as a result of the content. Here are...contribute. The moderator should identify the funny, provocative or interesting stories that will make for a fun...
  7. Common Injection Routes in Mice

    Type
    Blog Post
    Published
    Jan. 22, 2025, 9:42 p.m.
    ...mechanical restraint Location: back or hind legs Gauge: 25–27 Volume: < 2–3 ml (~1 ml per site) Skill required...! Table 1: Summary of common injection routes in mice. Injection Route Restraint Location Gauge Volume... advanced and finally, to expert.   Figure 1. Visual representation of common injection routes ...hind legs; between skin and muscle 25–27 < 2–3 mL (~1 mL per site) Beginner Intradermal Anesthesia Between...resources on the Addgene blog Mouse Modeling Part 1 Mouse Modeling Part 2 Five Popular Model Organisms.... It sounds complicated but has a pretty low learning curve! Restraint: scruffing Location: throat Gauge... Restraint: mechanical restraint or anesthesia Location: tail vein or retro-orbitally Gauge: 27–30 Volume...
  8. Starter Guide to induced Pluripotent Stem Cells (iPSCs) Part 2:  Reprogramming and Transdifferentiation

    Type
    Blog Post
    Published
    Nov. 6, 2018, 1:12 p.m.
    ...type of choice in vitro is known as reprogramming [1]. The process can be divided into two stages: Dedifferentiation...//www.linkedin.com/in/kmukherjeephd/.  References 1. Hochedlinger, K. and R. Jaenisch, Nuclear reprogramming...from human peripheral blood. Cell Stem Cell, 2010. 7(1): p. 15-9. PubMed PMID: 20621044. PubMed Central PMCID...induced pluripotent stem cells. Hepatology, 2010. 51(1): p. 297-305. PubMed PMID: 19998274. PubMed Central... pluripotent stem cells. Nat Biotechnol, 2014. 32(1): p. 84-91. PubMed PMID: 24291815. PubMed Central ...keratinocyte lineage. Methods Mol Biol, 2014. 1195: p. 1-12. PubMed PMID: 24510784. PubMed Central PMCID: PMC4096605...induced pluripotent stem cells. PLoS One, 2010. 5(1): p. e8763. PubMed PMID: 20098701. 31. Tang, Z.H.,...
  9. Viral Vectors 101: Pseudotyping

    Type
    Blog Post
    Published
    April 20, 2021, 2:30 p.m.
    ...disadvantages: Table 1 (Joglekar et al., 2017)  Table 1 (Gutierrez-Guerrero et al., 2020) Table 1 (Cronin et al...polyA tail.   Figure 1: Lentiviral production uses three plasmids: (1) The transfer plasmid, (2)... specific purposes as described previously (Table 1, Gutierrez-Guerrero, et al, 2020). Because retrovirus...The glycoprotein will be incorporated into the replicating rabies virus envelope, travel retrogradely, and... Pseudotypes: Precious Tools to Improve Gene Modification of Hematopoietic Cells for Research and Gene...
  10. Starter guide to induced pluripotent stem cells (iPSCs) part 1:  A renaissance in regenerative medicine

    Type
    Blog Post
    Published
    Oct. 30, 2018, 1:04 p.m.
    ...into more specialized cells with specific functions [1]. In many tissues, stem cells serve to replenish/replace...damaged cells that no longer function adequately [1]. Stem cells’ ability to differentiate into multiple...://www.linkedin.com/in/kmukherjeephd/. References 1. Dittrich, R., M.W. Beckmann, and W. Wurfel, Non-embryo-destructive...The potential of muscle stem cells. Dev Cell, 2001. 1(3): p. 333-42. PubMed PMID: 11702945. 6. Cowan, C....preimplantation genetic diagnosis. Hum Reprod, 2008. 23(1): p. 46-53. PubMed PMID: 17989069. 8. Takahashi, K...stem cells are: Their ability to self-renew or replicate while maintaining the undifferentiated “stem” ...Unipotency: As the name suggests, cells under this category can differentiate into only one cell type. Muscle...
  11. 500,000 Plasmids Shipped and Counting!

    Type
    Blog Post
    Published
    March 26, 2015, 3:24 p.m.
    ...Cambridge office – previously at 1 Kendall Square, but newly relocated to 75 Sidney Street. Then the plasmids...here at Addgene – 500,000 plasmids shipped! That's a 1/2 million plasmids sent to happy scientists around...Have a question? Email: [email protected] Call: +1 (617) 225-9000         ...
  12. Some Like it Hot: Thermostable GeoCas9

    Type
    Blog Post
    Published
    Sept. 14, 2017, 12:40 p.m.
    ...Cells? Yes Yes Longevity in Serum?* No Yes Table 1. Comparing SpCas9 and GeoCas9. *For in vitro Cas9 ...GeoCas9 is active at high temperatures Figure 1: Thermostability of SpCas9 vs GeoCas9. SpCas9 or GeoCas9...from 25-80 °C. Activity is expressed as Kcleave (min-1). SpCas9 has maximum activity from 35-45 °C, while...outperformed SpCas9 at high temperatures. See Figure 1 for a summary of the experimental results. GeoCas9...could also be used with in vitro molecular bio applications that require high temperature reaction conditions...
  13. Google Forums Round Up: First Impressions of NgAgo

    Type
    Blog Post
    Published
    Aug. 4, 2016, 2:30 p.m.
    ...the genome, which seem resistant to Cas9 cleavage (1). Both the CRISPR-Cas9 and NgAgo genome engineering...it was first published in Nat Biotech in May 2016 (1), NgAgo has received much attention and the plasmid...Pooran's NgAgo Survey Survey results As of August 1, 2016, a total of 165 researchers responded to the...the cell, the same method used by Gao et al, 2016 (1). View the Complete and Up-to-Date Results of Pooran's... dreams of a sunny day in Edinburgh.   References 1. Gao, Feng, et al. "DNA-guided genome editing using...been excitedly testing NgAgo's genome editing applications. So, how does NgAgo stack up thus far? A few...survey. When asked if they could detect indels (an indication of gene disruption ability) with NgAgo, one respondent...
  14. Plasmids 101: Mammalian Vectors

    Type
    Blog Post
    Published
    March 25, 2014, 3:15 p.m.
    ...premature chain termination 1-10 ug/mL Zeocin Sh bla HeLa, NIH3T3, CHO, COS-1, 293HEK, Jurkat T cells Complexes...effective replication. Cell lines expressing the Epstein–Barr virus (EBV) nuclear antigen 1 (EBNA1) or...Concentation*** Blasticidin bsd  HeLa, NIH3T3, CHO, COS-1, 293HEK Inhibits termination step of translation ... a bacterial origin of replication (ORI) will not allow for plasmid replication in mammalian cells, for... their bacterial counterparts, including how replication occurs and whether selection is necessary for...the nuclear genome, in the absence of plasmid replication, the foreign DNA will be degraded or diluted ...always mission critical to make sure the plasmid replicates in the cell, as many of these experiments are...
  15. Viral Vectors 101: AAV Serotypes and Tissue Tropism

    Type
    Blog Post
    Published
    Jan. 16, 2025, 2:15 p.m.
    ... astrocyte-directed transduction. Nature Communications, 14(1), 3792. https://doi.org/10.1038/s41467-023...them to target particular cell types. Figure 1: Diagram of AAV components. Created with BioRender.com...depends on your choice of promoter/enhancer. Table 1: AAV capsids and receptors. Capsid Primary receptor...required)2 Human fibroblast growth factor receptor 1 (FGFR1)3 αVβ5 and α5β1 integrins3 Hepatocyte growth...structure of AAV2, so they are formally called rAAV2/1, rAAV2/2, and so on, although we often use abbreviated...utilizing various AAV serotypes. Scientific Reports, 15(1), 20927. https://doi.org/10.1038/s41598-025-05518-... and Transduction by Adeno-Associated Virus Types 1 and 6. Journal of Virology, 80(18), 9093–9103. https...
  16. Using Phosphoserine to Study Protein Phosphorylation

    Type
    Blog Post
    Published
    June 23, 2016, 2:30 p.m.
    ...them with TAA (7). This modification allowed the deletion of release factor 1, the protein responsible...cellular proteins are modified through phosphorylation (1). However, the expansion of studies on protein phosphorylation...three components required for translation (Figure 1): A tRNA that recognizes a specific ‘open’ codon ... open reading frame (ORF) of interest (Figure 2). 1. The phosphoserine OTS The backbone of the phosphoserine...Rinehart lab: pCRT7 NT TOPO E17TAG GFP and pGEX-6P-1. The pCRT7 NT TOPO vector contains a mutant pSer-containing... can follow her on Twitter @nieminm.   References 1. Cohen, Philip. "The origins of protein phosphorylation...most inclusive databases of post-translational modifications, identifies a staggering ~250,000 phosphorylation...
  17. Simplify Cloning with in vivo Assembly

    Type
    Blog Post
    Published
    Oct. 18, 2018, 12:37 p.m.
    ...transformation (Figure 1). As this approach requires no special reagents or purification kits, it is low cost...with linearized vector backbone. DpnI digestion - 1 μl DpnI is added to the PCR mix to remove parental...confirm primer design.  Use minimal template DNA Use 1 ng of PCR template DNA to minimize false positive ... by PCR, so we usually add DMSO (3%) and Betaine (1 M) to the PCR mix. When PCR is not possible Some plasmids...Twitter @jakefwatson and @JGarciaNafria.  References 1. Jones, Douglas H., and Bruce H. Howard. "A rapid ...3’ end binds template DNA for PCR amplification, while modifications and homologous sequences are encoded...multiple modifications A key feature of IVA cloning is the ability to combine multiple modifications. Any ...
  18. Cpf1: A New Tool for CRISPR Genome Editing

    Type
    Blog Post
    Published
    Oct. 14, 2015, 2:30 p.m.
    ...guide for a refresher on CRISPR/Cas9.  Figure 1: Cpf1 is a single RNA-guided endonuclease of a class... than the multi-subunit complex employed by class 1 systems. A putative new class 2 nuclease, Cpf1 (CRISPR...that Cpf1 can tolerate mismatches at gRNA positions 1, 8, 9, and 19-23. Accordingly, the 3’ end of the gRNA...Most gRNAs directed low-frequency Cpf1 cleavage at 1-12 off-target sites; in contrast, SpCas9 may cleave...the diversity of CRISPR-based systems. References 1. Zetsche, Bernd, et al. "Cpf1 is a single RNA-guided...mismatches on modification by AsCpf1 (red) or LbCpf1 (blue). Mismatch positions are indicated below each ... this publication at Addgene. Makarova, Kira S., et al. "An updated evolutionary classification of CRISPR-Cas...
  19. Multiplexed Capture of Promoter-enhancer 3D Chromatin Structures Using CRISPR

    Type
    Blog Post
    Published
    July 2, 2020, 12:40 p.m.
    ... Table 1: Key differences between original CAPTURE and CAPTURE 2.0 methods.   Applications of CAPTURE...by PCR or next-generation sequencing. Figure 1: Overview of the key steps of the CAPTURE method. ...ligases Expression system Stable cell line expressing 1) FLAG-biotin-tagged dCas9, 2) BirA, and 3) one or ...or more gRNAs Two separate lentiviruses delivering 1) a BioTAP-tagged dCas9 and an eGFP tag, and 2) gRNAs...The Xu lab presented three ways to use CAPTURE 2.0: 1. Multiplex capture of chromatin interactions The Xu... gene’s transcription. Sometimes enhancers are located thousands of base pairs away from the gene they...created a dCas9-based CAPTURE (CRISPR Affinity Purification in situ of Regulatory Elements) method. The ...
  20. Magnetic Control of Proteins: More than a Dream

    Type
    Blog Post
    Published
    Sept. 24, 2024, 1:15 p.m.
    ...the sample (by less than 1%) and recovered after the magnet was removed (Figure 1). At first, Andrew and...since the initial report in 2023.)     Figure 1: Fluorescence intensity of EGFP-FlavinTag in E. coli...that could be expressed and purified. Although a ~1% change in signal might not make a very powerful tool...Hayward et al. 2024 under CC-BY license.   Video 1: Fluorescence movie of E. coli expressing MagLOV while... tools for familiar applications. But how does one invent a tool for applications that don’t even exist...phenomenon, improve the tool, and develop new applications for magnetoresponsive proteins. Motivated by...organisms) are opaque, which makes most biomedical applications of these tools difficult or impossible. But ...
Showing: 101 - 120 of 614 results